Abstract:

In this study, a global seamline network generation and optimization method based on Voronoi diagrams is proposed for orthoimage mosaicking. First, from the centers of valid areas for each orthoimage, the Voronoi diagrams algorithm is applied to generate a globally consistent seamline network, determining the mosaic polygon of each orthoimage. Then, vertices of the mosaic polygon are relocated with the use of DSM to avoid holes in the final photomosaic and ensure those vertices are located on the ground area. So that the seamline can avoid crossing objects with large projection difference such as buildings and trees after being further optimized. Experiment results demonstrate that the proposed method is feasible and has good adaptability.

Key words: digital orthophoto map, digital surface model, orthoimage mosaicking, seamline network, Voronoi diagrams